Loom



J. C. BROOKS.

LOOM.

APPLICATION FILED MA! 13,!920.

3 SHEETSSHEET I- lnvenTor. John C. BrooKs by I W& q 1

igl.

J. C. BROOKS.

LOOM.

APPLICATION FILED MAY 13, 1920.

Lamfimm I Emma MM, 11.921

Fig.2.

3 SHEETSSHEET 2- JOhn C. BrooKs MQMAW UNITED STATES JOHN C. BROOKS, OF PA'IERSON, NEW JERSEY.

LOOM.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed May 13, 1920. Serial No. 881,190.

To all whom; it may concern:

Be it known that L'JOHN C. BRooKs, a citizen of the United States 16S1d111% at Paterson, county of Passaic, state of ew Jersey, have invented an Improvement in Looms, of. which the following description, in connection with the accompanylng drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to looms of that type which are constructed to deliver the picks of filling to the shed by means of an air blast whichacts directly on the filling, and the object of the invention is to provide a loom of this type having improved means for controlling the fillingso that the latter may be accurately and properly laid in the shed. D

My improved loom is provided with a nozzle through which the weft or filling is delivered to the shed and novel means for pulling off a length of filling from the source of supply at each pick and then releasing said length and afterward delivering said pulled-off length tothe shed by a blast of air. My invention also comprises an improved means for cutting each length of filling close to the edge of the fabric after it has been introduced.

In, order to give an understanding of my invention, I have illustrated in the drawings a selected embodiment thereof which Wlll. now be described, after which the novel features will be pointed out in the appended claims.

In the drawings, Figure 1 is a front view of a loom embodying my invention;

Fig. 2 is a side view thereof with the filling pulling-01f vfeature omitted; v

Fig. 3 is a section on the broken line 3-3, Fig. 1;

Fig. 4 is a side view of the filling-engaging fingers of the pulling-01f mechanism showing said fingers in operative position;

Fig. 5 is a view showing the fingers released;

Fig. 6 1s a view showing the filling-cut ting element;

Fig. 7 is a trolling valve.

In the loom herein illustrated, 1 indicates the loom frame which may be of any suitable or usual construction; 2 the lay having the reed 3 thereon; 4 the reed cap or hand rail; 5 the lay-swords on which the lay is mounted and which are supported by the detail showing the air-conusual rock-shafts 6; 7 the harnesses and 8 the cams mounted on the cam shaft 9 which actuate the harnesses through the harnesslevers 10.

The parts thus far described are or may be all as usual in looms and form no part of my present invention.

In my improved loom, the weft or filling 1s dehvered to the shed through a-nozzle 11 by means of an air blast. I may arrange the loom so that the weft will all be delivered from one side thereof or I may employ two nozzles, one on each side, so that the filling will be delivered alternately from opposite sides. I have herein illustrated two nozzles 11 which are supported by the lay on opposite sides thereof. Each nozzle is branched, one branch 12 being connected to a source of air supply, not shown, by a flexlble pipe 71, and the other branch 13 receiving the filling 14 from the source of supply. These two branches come together at 15, and the delivery end 16 of the nozzle is directed longitudinally of the lay and is situated in front of the reed 3. When, therefore, an air blast is delivered into the branch 12 of the nozzle, this will tend to draw the filling 14c through the branch 13 and blow the latter across the shed.

I have provided herein novel means whereby during each forward beat of the lay a length of filling will be drawn off from the source of supply which length will y vice for each nozzle, said pull-off devices being situated on opposite sides of the loom. Each pull-off device is supported in a suitable frame 17 at the side of the loom and comprises an endless chain element 18 passing around sprockets 19 and 20 carried by said frame and'having thereon pulling-off fingers 2]. adapted to engage the filling 14 and draw off a length from the source of supply and then to release the length when a suflicient amount has been pulled off. The filling is shown as coming from a source of supply 22 and as extending through suitable guide-eyes 23, 24c, 25-; 26 on its way to the nozzle. The guide-eyes 24 and 25 are situated on opposite sides of the path of movement of the pulling-off finger 21 so that as said finger is moved downwardly by the chain, it will engage the filling between the guide-eyes 24, 25 and draw oil a length of filling from the source of supply, forming said length into a bight or loop 27. When the proper length for the width of the cloth has been withdrawn, the fingers release this bight or loop.

The pulling-off finger 21 is a duplex affair and is carried by a support 28 that is pivotally connected to one of the links of the chain at 29. The fingers 21 are situated at the lower end of the support 28 and at 1ts upper end saidsupport has two later ally-extending fingers 30 that are adapted to engage two tracks 31, 32. The tracks 31, 32 extend above the guide-eyes 24, 25, and as each support 28 is carried over the upper sprocket 19 and begins to move down-' wardly, the projections 30 on said support engage the upper curved end 33 of the track thereby swinging the support into vertical position with the fingers 21 extending horizontally, as shown in Fig. 4. The fingers are thus brought into filling-engaging position before they reach the filling extending between the guide-eyes 24,25, and, consequently, as the support with the fingers 21 is moved downwardly, the fingers engage the filling and draw-off a length from the source of supply. When the support 28 has reached the position where the projections 30 pass ofi from the lower end of the tracks 31, 32, there is nothing to hold said support in its vertical osition, and the tension of the filling acting on the fingers 21 Will swing said support into the position shown in Fig. 5 thereby releasing the fingers from the filling. The sprocket chain 18 should be driven at the proper speed and in proper timed relation with the movements of the loom so that a correct length of filling will be drawn off by one or the other filling pulloff mechanisms at each beat of the lay. Where there are two filling ull-ofi' devices and two nozzles, then the pull-off device on each side of the la will be arranged to pull off its length of lling at every other pick so that the picks will be pulled off alternately on opposite sides of the lay. Each chain 18 may have one or more of these pullofi fingers mounted thereon, depending on the operations of the loom. The sprocket chains 18 may be driven in any suitable way. I have herein illustrated the lower sprocket wheel 20 of each pulling-off device as driven from the cam shaft 9 by means of suitably-timed sprocket-chain gearing 34.

In order that the pulling-off device may operate properly I have provided herein means to clamp the filling between the nozzle and the guide-eye 25 while the finger 21 is acting on the filling thereby to insure that the filling will be drawn off from the source of supply rather than being pulled back named clamping device is herein shown as a clamping member 35 arranged to clamp the filling against the front face of the hand-rail 4 adjacent the end of the nozzle branch .13. There is a clamping member 35 at each end of the lay, and each member is carried by a swinging lever 36 pivoted to the lay at 37 and acted upon by a coiled spring 38 which tends to move it into operative position in engagement ,with the hand-rail. Means are provided for releasing the clamping member 35 at such times as the filling is to be blown across the lay and where the filling is introduced from both sides of the lay, as herein illustrated, each clamping member will be released at every other pick.

For releasing each clamping member 35, I have shown a releasing lever 39. for each clamping member, each releasing lever being pivoted to the loom frame at 40 and being connected to the harness mechanism so that it will be raised and lowered therewith. When each lever 39 is in its lowered position, the outer end thereof is in the path of movement of the upper end of the lever 36 so that upon the backward movement of lever 39 and thereby causes the clamping lever to swing away from the lay and there-' by release the filling. So long as the releasing lever 39 is in 1ts elevated position, the corresponding clamping lever 36 Wlll be in its operative clamp ng position. The two releasing levers 39 are connected to different harnesses so that they operate alternately, and upon one backward movement of the lay one of the levers will release its clamping lever 36, and upon the next backward movement of the lay, the other releasing lever will release its clamping lever, The clamping levers 36 are thereby alternately actuated. Each releasing lever 39 is shown as connected to a harness by a flexible connection 41, but any other Way of operating the levers 39 might be employed without departing from the invention. The other clamp whichvis situated between the pulling-off fingers and the source of supply is herein shown in the form of a fixed block or plate 42 over which the filling passes. and a movable clam ing member 43 adapted to move toward and from the block 42 and thereby clamp and unclamp the filling. It is necessary, of course, that the clamping member 43 should be inoperative while the fingers 21 are pulling off a length of filling, so that the filling may be freely drawn off from the source of supply. I

whic 1 are actuated therefore,

havei porovided herein means y the fingers 21 for ren- The track dering the clamp 43 inoperative.

'32 is shown as carried on arms 44 which are pivoted to the framing 17 at 45, and said arms are connected by a yoke 46 to which the clamp 43 is secure by means of arms 47. Each arm is acted'on by a spring 48 and these springs normally tend to maintain the clampin member 43 in its operative position. henever the supporting member 28 is brought into a position by the sprocket chain so that one of the pro ections 30 engages the track 32, the pressure of said projection against the track will rock it about the pivots 45 thereby separating the clamping member 43 from the block 42 and unclamping the filling. The filling will remain unclamped so long as the support 28 is assin over the track 32 and while the fillin is eing pulled ofi from the source of supp y. When the finger 30 passes out of engagement with the lower end of the track 32, then the springs 48 return the clamping member 43 to its clamping osition and hold the filling clamped until t e projections 30 on another support 28 comes into engagement with the track 32 again.

i The clamping member 35 is arranged so that it operates alternately with the clamping member 43.

Any suitable means may be provided for delivering the air blast to the nozzle after the length of filling has been pulled oif from the source of supply and when the lay is at the back end'of its stroke. Where the nozzle is connected to a permanent source of air supply, such, for instance, as a tank contaming compressed air, I may provide a valve mechanism in said pipe 71 which is normally closed, but which will be automatically 0 ened when the lay beats back. In Fig. 7 have shown such a valve which comrises a cylinder 72 interposed in the pipe 71 and having ports with which the two sections of said pipe communicate, and a piston or plunger 73 which normally closes said ports. his plunger 73 is provided with a stem 74 having a collar 75 thereon, and a spring 76 surrounds the stem and acts on the collar and normally holds the plunger in the position shown in Fig. 7. The valve with its stem moves back and forth with the lay, and the loom frame is provided with a projection 77 situated to be engaged by the stem 74 just before the lay completes its backward movement, so that while the lay is passing its rear center, the plunger will be acted on by the projection 77 therebyshifting the piston valve 73 into a position to open the ports. As soon as the ports are 0 en a blast-of air will be delivered through t e nozzle to blow the pulled-oil length of filling throughthe shed. The construction will preferably be such that the valve will -a knife 50, each knife being carried by a stem 51 which is pivoted to the lay at 52. Each knife 50 normally stands at the rear of the reed and means are provided for swinging the knife forwardly into the dotted line position thereby to engage and sever the filling thread when the lay beats up. For this purpose, the lay is provided with a plunger 53 slidably mounted through the lay and engaging at one end the lower end of the stem 51 below the pivot 52 and other end projecting forwardly beyond the lay and provided with ahead 54. A return spring 55 is confined between the lay and the head 54. The plunger 53 is so situated that when the lay beats up the head thereof will engage the breast-beam or some other fixed part of the loom and will be forced to therear against the action of the spring 55 thereby swinging the knife forwardly and causing it to sever the filling thread.

It will be noted that I have shown two fingers 21 carried by each support 28. The

object of having two fingers is to provide for forming two bights in each filling thread as it is drawn ofi. This could be done by placing a second stationary guide between the fingers so that each finger would pull off a separate bight. In this way twice the length of filling will he pulled off at each actuation of the fingers than where one bight only of filling is drawn off.

While I have illustrated in the drawings a selected embodiment of my invention, I do not wish to be limited to the constructional details shown.

4 I claim:

1. In a loom, the combination with means to form sheds in the warp threads, of means to draw ofi a length of filling thread from a source of supply and then release said length from the drawing-0E means, means to lay said length in a shed by an air blast. and means to engage the filling thread while said length is being pulled off to prevent it from being pulled out from the shed.

2. In a loom, the combination with means to form sheds in the warp, of a filling-delivery nozzle, to which the filling is led from its source of supply, means for drawing off a length of filling from the source of supply, means for delivering an air blast to said the - shed, and means to grip the filling adjacent the nozzle while the length is being pulled off thereby to prevent the filling from being withdrawn from the shed.

3. In a loom, the combination with a lay, of means to form sheds in the warp, a fillingdelivery nozzle carried by the lay, means for drawing of a len h of filling from a source of supply and t en releasing said length from the drawin -olf means, means to cause an ai blast to e delivered through said nozzle when the lay is in its backward oother between said pulling-off device and the sit-ion thereby to blow said length of fill ng across the shed, and means to grip the filling adjacent the nozzle while said length 1s being pulled off thereby'to prevent the filling from being withdrawn from the shed.

4. In aloom, the combination with a lay, of means to form sheds in the warp, a fillingdelivery nozzle carried b the lay, means for drawing ofi a length of llingvfrom a source of supply and then releasing said length,

meansto cause an air blast to be delivered through said nozzle when the lay is in its backward position thereby to blow said length of filling across the shed, and means to grip the filling adjacent the nozzle while said length is being pulled off thereby to prevent the filling from being withdrawn from the shed and to release the filling while the air blast is operative.

5. In a loom, the combination with a lay, of means to form sheds in the warp, a fillingdelivery nozzle carried by the lay, means for drawing off a length of filling from a source of supply and then releasing said length, means to cause an air blast to be delivered through is in its backward position thereby'to blow said length of filling across the shed, means to clamp the thread adjacent the nozzle, and means to release said clamp when the lay moves backwardly. I

6.. In a loom, the combination with a lay,

of a filling-delivery nozzle carried thereby,

a filling pull-off device for pulling off a length of filling from a source of supply and then releasing said length, two filling clamping devices, one situated to act on the filling between the pulling-off device and the nozzle and the other between said pulling-off device and the source of supply, and means to cause said clamping devices to operate alternately.

7. In a loom, the co bination with a lay, of-a filling-delivery nozzle carried thereby, a filling pull-off device for pulling off a length of fillling from a source of supply and then releasing said length, two automatically-operative filling clamping devices, one situated to act on the fill-ing between the pulling-oil device and the nozzle and the other between said pulling-off device and the. source of supply, and means torender of a filling-delivery ated to act on the 1 ing device inoperative while saidnozzle when the lay the last-named clam in device inoperative while said length 0 fil ing is being pulled oif and the first-named clam ing device inoperative while said length is being blown through the shed.

n a loom, the combination with a lay,

of a filling-delivery nozzle carried thereby,

source of supply, means actuated by the pulling-off device to render the last-named clampmg device inoperative while said length of filling is being pulled off, and vmeans to render the first-named clamping device inoperative while said length is being blown through the shed.

-' 9. In a loom,

' nozzle carried thereby, a filling pull-ofi device for pulling ofi a len h of filling from a source of supply and t en releasing said length, two automatically operative filling clamping devices, one situing-ofi device and the nozzle and the other between said pulling-off device and the source of supply, means actuated by the pulling-oil devicelto render the last-namedclamping device inoperative while said 'length' of filling is being pulled off, and

means actuated by the backward movement offthe lay to render the first-named clampsaid length is being blown through the shed.

of a filling-delivery nozzle, means to deliver an air blast therethrough for blowing the filling acrossthe shed, and means for drawing off a length of filling for each pick and then releasing said. length, said means comprising an endless-chain element and a pulling-ofi' finger carried thereby.

the combination with a lay,

filling between the pull- 10. In a loom, the combination with a lay, I

11. In a loom, the combination with a lay,

means to deliver of a filling-delivery nozzle,

to blow filling an air blast therethrough across the shed, an pulling-oil finger; pivotally carried thereby, means to cause the finger during the movement of the chain to engage the filling thereby to draw of! a length from the source of supply and then to release the filling.

12. In a loom, the combination with means.

to form sheds in the warp threads, of a filling delivery nozzle to which filling is led from a source of supply, a constantly-mow ing device adapted to engage said thread between the nozzle and the source of supply and draw off a length of filling from said source of supply and then free said len h from said device, means to grip the'fillmg endless-chain element, a

adjacent the nozzle while said length is being pulled off thereby to prevent the filling from being withdrawn from the shed; and means for delivering an air blast to said nozzle to blow the drawn ofi' length of filling through the shed.

14. In a loom, the combination with means to form sheds in the warp threads, of a filling-delivery nozzle to which filling is led from a source of supply, an endless-chain devlce, means carried thereby for drawing .ofi a'length of filling'from the source of supply and then freeing said length from the drawing-off means, means for delivering an air blast to said nozzle for blowing the freed length of filling through the warp shed, and means to grip the filling adjacent the nozzle while said length is being pulled off to prevent the filling from being withdrawn from the shed.

15. In a loom, the combination with means to form sheds in the warp threads, of a filling-delivery nozzle to which filling is led from a source of supply, and an endlesschain device, means carried thereby for drawing off a length of filling from the source of supply and then freeing said length from the drawing-off means, means for delivering an air blast to said nozzle for blowing the freed length of filling through the warp shed, and means to grip the filling between the pulling-off device and the source of supply while the air blast is operative thereby to prevent the latter from withdrawing any filling from the source of supply.

16. In a loom, the combination with means to form sheds in the warp threads, of a filllug-delivery nozzle to which filling is led from a source of supply, an endless-chain device, means to actuate the latter, a pulling-ofi' finger carried thereby and adapted to engage the filling between the source of supply and the nozzle thereby to draw off a length of filling from the source of supply, means to disengage said filling from the finger when the des red length is pulled off, and'means todeliver an air blast through the nozzle to blow said pulled-off length through the shed.

In testimony whereof, I have signed my I name to thisspecification.

JOHN, C. BROOKS. 

